Tengu format ruling
Morale Boost

Card effect (current official text)Each time a player equips an Equip Spell Card, increase the Life Points of the controller of that Equip Spell Card by 1000 points. Each time an Equip Spell Card is removed from the field, the controller of that Equip Spell Card takes 1000 points of damage.
Rulings
- If Morale Boost and other Equip Spell Cards are destroyed at the same time with Harpie's Feather Duster or Heavy Storm, Morale Boost does not inflict any damage.
- While your Morale Boost is active, and you activate your opponent's Equip Spell Card that you had because of Exchange, when that Equip Spell Card is removed from the field it is you that takes the damage.
- Morale Boost's effect includes when monsters are equipped to Relinquished or Sword Hunter, and when such equipped monsters are removed from the field.
- Morale Boost's effect includes Kisetai, and Union Monsters equipped to another monster by their own effect, and when such equipped monsters are removed from the field, and when Union Monsters detach and become monsters again.
- Morale Boost's effect includes when you equip an Equip Spell Card to your opponent's monsters, and when such cards are removed from the field.
- Morale Boost's effect includes when you Summon Guardian Elma and resolve her effect.
- Morale Boost's effect includes when Tailor of the Fickle is used.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.